Radio receiving apparatus



Dec 31 1929. R. v. JUDSON am. 1,738,172

RADIO RECEIVING APPARATUS Filed Sept. 8, 1924 2 Sheets-Sheet l m@ We M Dec- 3, 1929- R. v. JUDsoN ET AL 1,738,172

RADIO RECEIVING APPRTS Filed sept. 8, 1924 '2 sheets-sheet' 2v Patented Dec. v3, `1,9 29

'UNITED STATES PATENT OFFICE nnss-ELI. v. Jonson, Yoir;.unimorr;Aim-cmunnns c .imvua` or rnN'roN, mexican,

' V'ANnffnzown lo. um, or creano, lmcmors famo nncnrvnre arranafrus vApplication led September 8, 1924. Serial No.78,522.

The purpose-of this invention is-to prol vide a snnple form of mounting for radio receiving apparatus by .which itmay be readily installed in a variety of styles ofphonograph cabinets and the like of either the upright or console type, such mounting being adapted to permit ready removal of the radio unit from the cabinet for inspection or .repair without danger of injury to the a aratus. l vention has the furthero )ect of arranging the controlsupon an'ad'ustablepanel which may be secured at an oblique position convenient to the operator-1n tuning the'receivlng set.. It consists of certain features andelements of construction in combination as hereinafter shown and Vdescribedand .as particularlyindicated inthe appended claims.

In the drawin z' Fi re 1 is 'a' ront elevation onf-a phono4 grap cabinet havinga radio receiving set y installed in accordance with this invention.

.Figure 2 is a horizontal -sectionltaken substantially as indicated-at line y2-2 on Figure 1'.

Figure 3 is a ve'rtical-,section taken as indicated .at line 3-3 on Figure 1.

Figure 4 is a fragmental detail view of an improved multiple connector for the circuit' Fi ure'lO is likewise a verticalv section Ashowlng a fourth modification of the invention. 4

For the purposes of illustration we have chosen a cabinet of the so-called console type which is divided by a partition, 1, into two compartments, one of which may enclose a phonograph mechanism `whose winding crank is shown at 2 and whose horn oramplifier, 3, occupies the lower portion of the comand Figure 3 indicates the arran ement of partment,rhaving agrille, 4, through which the sound escapes into the room. Av front. panel, 5, for enclosing and'conc'ealing the grille, 4, is indicated in Figure 1. -At the rearof the compartment the amplier, 3, is contracted and curved upwardly to form 'a sound conduit, 6, leading from the usual tone arm and phonograph4 reproducer not shown. The in- The other half of the cabinet is used to house the radio receiving apparatus and the' majority of this apparatus is mounted on a special panel which 1s shown as a sheet, 7, of thin ply-wood or other suitable material such as vulcanized ibre,` condensite or some vsynthetic substance. The sheet, 7, is mounted in a frame, y8, as shown in Figures 2 and 3 and it supports at the rear side a shelf, 9, extending ati right angles fromthe planeof the sheet,

= 7. Figure 2- shows a tuning coil, 10,- anda vario-coupler, 11, mounted onl the shelf, 9v

the one or more vacuum tubes, 12, 1n sockets,

v13, on the under side of said shelf. The control dials, 14, and knobs,.15, are disposed at the front side of the panel, 7,-one of the dials being indicated as connected to the' variable condenser, 16, at the rear side of' the panel and the vother dial being connected for v adjusting the vario-coupler, 11. Itfnay be understoodthat other units of apparatus than those indicated may be substituted to lprovide any desired hook-up without departing from the spirit of this invention. A fixed shelf, 1,7, extends `forwardly into the compartment from the rearl wall of the cabinet and may beutilized to support a storage battery, 18, as shown in Fi ure 2 .space being aorded below the shel 17, for the other battery usually required.

The panel, 7, is pivotally supported in the opening lat the front of the left hand compartment by means ofpivot'pins, 19, projecting horizontally at the margins `of the openy in to engage downwardly open hooks, 20, wlich are secured to the rear faces of the frame members, 8, of the panel. In the arrangement shown in Figure 3 the pins, y19, are located near the upper edge of the opening so that the panel may vbe swung into oblique position with its lower edge entirely 14, to a convenient angle for reading and adjustment by a person seated or standing in front of the cabinet. A brace member, 21, may be hinged to the lower frame member, 8, of the panel with its opposite end trailing between guides, 22, as the panel is swung forwardly so that the down-turned portion, 23, of said trailing end of the brace may engage in a retaining notch of the fitting, 24, as shown in Figure 3. YFor returning thepanel to vertical position it is only necessary to lift the brace, 21, slightly to free it from the notch in the part, 24, and thus allow the panel to swing back.

When the apparatus is associated with the phonograph it isa simple matter to utilize the amplifying horn, 3, of the phonograph in connection with the telephone receiver, 24, by mounting the latter over a short branch, 25, extending laterally from the conduit, 6, so that the sound waves set up by the telephone diaphragm may be transmitted to the air in the conduit, 6, and amplified in' the same manner in which the vibrations originatingat the phono raph diaphragm are in# creased in volume. referably the telephone,

I 24, the batteries andthe aerial and ground wires, 26 and 27, which are shown entering the back of the cabinet are detachablyconnected to the apparatuscarried on the panel, 7. For this purpose theishelf, 9, has a series of binding screws, 28, each associated with a contact blade, 29, and the wires from the various pieces of apparatus carried by the panel are connected to these binding screws. A support, 30, preferably made of the same insulating material as the panel, 7, carries a row of corresponding contact blades, 31, to which are attached the various wires leading to the fixed elements of the set such as the telephone andbatteries. Thehooks, 20, bein downwardly opened are readily disengaged rom the pivot pins, 19, whenthe panel is swung to oblique or horizontal position and then to permit complete removal of the panel and its associated apparatus it is only necessary -to withdrawy the support, 30, `from the'shelf, 9, 'thus slidably disengaging the blades, 31, from the blades, 29, with which they interlap in connected position. The relation of the parts. immediatey following such disconnection is shown in igure 4.

Figure 7, being a section somewhatsimilar to Figure 3, illustrates the same type of cabinet but the units of thevreceiving set are difvferently supported. A anel, 40, completely fills the opening at the ront of the compartment in which the set is housed and near its lower edge said panel supports, a second panel,

' 41, of less area and attached to the panel, 40,

at a slightly acute angle. Thelpanel, 40, is

mounted inthe cabinet-by mean-s of hooks, 20, engaging pifvct pins, 19, but is intended to be swung through a' wide angle to the dotted line 43, in the side wall of the compartment. This position of the panel, 40, brings the panel, 41, to approximately vertical position, preferably somewhat inclined to facilitate reading' of the dials, 14, which are carried by the panel, 41, with which areassociated the control knobs, 15, of the apparatus. This arran ement has the advantage of swinging the kno s and dials to a slightly higher position than when they are mounted as shown in Figure 3 and also of moving them farther from the cabinet itself, leaving better knee 'space for the operator if he sits in front of the panel, 41.

Figure 8 shows an arrangement more nearly similar to that of Figure- 3 in which a single panel, 50, supports all the units of the apparatus directly on its rear face while the control knobs, 15, are-accessible at the for lward side Aof the panel. A pair of special arcuate supporting brackets, 51, extend from.

the rear face of the panel, 50, with their slots, 51, engaging guide studs, 52 and 53, so that the slots, 51, track over said studs as the panel back into the compartment of lthe cabinet after' firstslightl tilting the panel, 50, to

. and units attached thereto are easily pushed release the hooke end of the slot, 51, from the post, 52.`

In Figure 9 the arrangement of the parts is inverted as compared with Figure 7, the front panel, 60, being su plemented by a smaller panel, 61, supporte at an acute angle near the upper edge of the panel, 60, so as to present the dials, 14, and knobs, 15, for access when the upper edge ofthe panel, 60, 1s drawn forward from the cabinet. Near the lower edge the panel, 60, is fitted with hooks,

20, engaging ivot studs,- 19, to form a hinge. At its forwar limit the panel, 60 1s retained by a hook, 62, engaging the stud 63, in the side wall of the compartment. The units of the apparatus are distributed upon the inner walls of the may dictate.-

Figure 10 illustrates the same pair of dials, 60 and 61, as. shown in Fi re 9, but with the hooks, 20, andpivot stu 19 located at about the middle of the height of the panel 60, so that as its upper edge 1s tilted forward the panel, 61, is brought to a. more steepl inclined`position approaching the vertica but still sufliciently tilted to facilitate reading of the dials, 14, and o erating the knobs, 15.

.It will be seen t at with an of the depanels, 60 and 61, as convenience scribed arrangements 'the insta ation ofthen 13 radio receiving set in a phonograph cabinet of standard design requires merely the aplplication of two or three simple fittings suc as the pivot studs, 19,V and a guide way, 22, and that after such installation the radio set can be very easily and quickly removed from the cabinet for repair or adjustment.

Fi ure 6 shows a special form of safetyswitc Mcomprising a xed contact, 70, and a. spring contact arm, 71, mounted on a corner post, y72, of the cabinet just inside the door,

- 73, which closes the compartment containin vthe radio apparatus. A plunger, 74, is guide in the post, 72, so that when the door, 73, is closed it will engage the protrudin end, 75, of the plun er, 74, and force the atterv inwardly to liit the spring member,'71, out of contact with the part, 70. L ead wires extend from the switch to the battery connections so that whenever the cabinet is completely closed in this manner the battery circuit will be'opened, thus avoiding overheating or unnecessary use of the vacuum tubes, 12.

1. In combination with a radio receiving set, a cabinet for housing the apparatus, sai

cabinet having an opening at one side with a 'y panel `fitted 1n the o ening standing normally in a vertical p ane but mounted for swinging outwardly about a horizontal axis, said panel supporting certain units and control members of the apparatus; and means adapted to limit the swing of the panel at a position in which the control members are presented in an inclined plane which extends y upwardly and away from the operator at a convenient angle for manipulation.

2. In combination with a radio receiving set, a cabinet for housing the apparatus having an opening at one sideg-.a panel fitted in the opening and standing normally in a. ver

' tical plane; certain units of the apparatus being mounted on, the inner side of said panel with control members accessible at the outer side, the panel being mounted for swinging outwardly about a horizontal axis near its upper edge into an inclined position to facilitate handling of lthe -control members and means for retaining the panel at such inclined position.

In testlmony whereof, we have aixedour' signatures to this s ecication.

g l ED O. KLEMM.

CHARLES CfDAVIS. RUSSELL V; JUDSON. 

